<template>
    <el-container class="home-container">
        <!-- 头部 -->
        <el-header>
            <div>
                <img src="../assets/logo.png" alt="" /> <span>后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse? '64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409efe" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 模板区 -->
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{ item.authName }}</span>
                        </template>
                        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{ subItem.authName }}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 主体 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-lock_fill'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList() {
      const res = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('res.meta.msg')
      this.menulist = res.data
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}
.el-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #373d41;
    > div {
        height: 100%;
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }
        img {
            height: 100%;
        }
    }
}
.el-aside {
    .el-menu {
        border: none;
    }
    background-color: #333744;
}
.el-main {
    background-color: #f2f4f7;
}
.iconfont {
    margin-right: 10px;
}
.toggle-button {
    font-size: 10px;
    background-color: #4a5064;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    color: #aaa;
}
</style>
